Mining-machine



2 Sheets-Shet l. H. F. DORIS & J. J. MOGLOSKEY.

'(No Model.)

MINING MACHINE.

Patented Jan. 5,1897.

I Witnesses:

Inventor?! Attorney? Tm; Noam vans w, wuro-umou wnumcrrom u c UNITEDSTATES PATENT OFFICE.

HUGH F. DORIS AND JOHN J. MCOLOSKEY, OF PITTSBURG, PENNSYLVANIA.

MINING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 574,790, dated January5, 1897.

Application filed May 21, 1895. $erial No. 550,109. (No modehl such aswill enable others skilled in the art to which it pertains to make anduse it, reference being had to the accompanying drawings, which formpart of this specification.

This invention relates to improvements in mining-machines, the objectbeing to provide an improved powerful driving mechanism for thecutter-heads5 to arrange a conveyer in an improved manner with relationto the cutterheads; to provide an improved mechanism for feeding thecutters forward, and, finally, to so construct the framework of themachine as to inclose the driving and adjusting gearing so as to retainthe lubricant therefor as well as to exclude all dirt, grit, &c.

Vt ith these and other objects in view, which will presently appear, ourinvention consists in the features of novel construction hereinafterdescribed and claimed, and illustrated by the accompanying drawings, inwhich- Figure 1 is a plan view of the machine, partially in section.Fig. 2 is a longitudinal vertical sectional view. Fig. 3 is a verticalcrosssectional view 011 line 3 3 of Fig. 1. Fig. 4 is a similar view online 4 4 of the same figure.

The base 1 of the machine is formed with the central longitudinaldepression 2 and the dovetailed depressions 3 on each side of andextending parallel with the depression 2. 4 is a frame slidablelongitudinally on base 1, the

same being formed on its under side with the dovetails 5, which fit thedepressions 3 and guide the frame in its longitudinal movement.

From frame 4 also depends the interiorlyscrew-threaded sleeve-1n g 6into depression 2, so as to adjust the frame longitudinally on the baseby screw-shaft 7, extended through said sleeve-lug and mounted insuitable hearings in the end walls of depression 2. The end of by abracket 12 at the end of the base, and by means of the arrangement hereshown and described the frame 4 may be given a' positive forward orbackward movement, thus feeding the cutter-heads at the forward endthereof either to or from the coal, as desired, and at the requisitespeed.

A depression or cavity 13 is formed in casing 4, extending from end toend thereof, and the same is inclosed upon its upper side by cover 14.The cutter-heads 15 are arranged, as shown, above and below the casing4, the same being keyed to the end of short shaft 16, extendedtransversely through casing 4 and cover 14. The peripheries of the headsextend a short distance beyond the casing end, and secured thereto atproperintcrvals are the teeth 17. The shank of each tooth is let into adepression in the head-periphery and there held by key 18, whichoccupies a depression formed partially in the tooth and partially in thewall of the cavity, thus locking the tooth securely in position and atthe same time rendering it easily removable. On shaft 16, within thedepression 13, is gear 10, which is driven by the initial pinion 20through the medium of the intervening gears 21 and 22. All of thesegears are inclosed within cavity 13 and arranged in train fashion, so asto develop and transmit to the cutter-heads great speed and power.

The shafts 23 of gears 21 and 22 are let into sockets or bearings in thebottom of the frame or casing 4, as well as top 14, but preferably donot project entirely therethrough. Pinion 20 is on the lower end ofshaft 24, which maybe driven by any desired form of motors to be carriedon the upper side of the movable frame or casin g, as indicated in thedrawmgs.

For removing the loose coal from the cut.- ters, as well as knocking outthe core which may form between the upper and lower cutter, we providethe endless chain 25, having at intervals thereon teeth 26. This endlesschain passes around the exterior vertical sides of the movable frame orcasing and midway the cutter-heads, the friction-rollers 27, pivotedbetween ears 28, projecting from the frame, serving to hold the chain inproper position. Ears 28 extend slightly beyond the peripheries of therollers, so as to form guides 29 for holding the chain in propervertical adjustment. The chain is actuated by sprockets 30, arrangedwithin the rear corners of the slidable frame or casing and having theirperipheries projected outward only sufficiently far to carry the chainclear of the casing-sides. Gears 31 and 32 connect driving-pinions 20with the geared sprockets 30 for actuating the latter in the properdirection.

The inclosed cavity or depression 13 affords complete protection for thegear from dirt, grit, &c., and at the same time serves to retain thelubricant. The same is true of depression 2, in which screw-shaft 7 iscompletely incased and protected, together with the lubricating oil orgrease. It will be noticed that the corners and ends of the frame: workare rounded, sothat the machine may be easily slid to or from itsoperating position.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is-- 1. A mining-machine comprisinga stationary frame, a movable frame carried thereby,

cutters at the outer end of the movable frame, a carrier-chainencircling the movable frame and coacting with the cutters, adriving-gear for the cutters, a similar gear for the chain, and a motorcarried by the movable frame and common to and driving both the cutterand chain gearing, substantially as shown and described.

2. An improved mining-machine comprising a frame, the cutter-heads, theendless conveyor encircling the frame and extending between thecutter-heads, the friction-rollers, the supports for the rollersextended beyond the peripheries of the latter to form guides for thechain, and an operating mechanism, substantially as shown and described.

In testimony whereof We affix our signatures in presence of twowitnesses.

HUGH F. DORIS. JOHN J. MGCLOSKEY. \Vitnesses:

J. M. N EsBrr, GEO. E. FRECH.

